我们可能很难看到日常的化学作用，但几乎你接触的所有东西都有一些化学物质。

It can be very hard to see the everyday chemistry at work, but nearly everything you touch has some chemicals in it.

youdao

好吧，至于‘所有这一切的终点’，你看到过这个世界中什么东西终止存在了吗？

Alright, and as for 'the end of all of this,' have you ever seen anything in this world just cease to be?

youdao

把这个想法推而广之，当你登陆的时候，你可以看到朋友们的所有收藏，在其中找寻想要的东西。

Then we expanded this to say hey maybe when you log on, you can see everything that all your friends have and search for things in there.

youdao

You know, really, just kind of, you know, with your head up, just looking at everything so big.

当你抬起头时，你看到的所有东西都是如此地巨大。

美国的博物馆教育 - SpeakingMax英语口语达人